Question

Раскройте скобки и упростите
( 4 m + n ) - ( 2 m - n )

Answer 1

(4m+n)-(2m-n) = 4m + n - 2m + n = 2m + 2n

Answer 2

(4m+n)-(2m-n) = 4м+n-2м+n=2m+2n=2(m+n)